Metal-bending die.



G. A. QHL; JR. METAL BENDING DIE.

APPLICATION FILED APB. 8, 1914.

Patented Sept. 22, 1914.

'IIIE NORRIS IE1ERS 1: 9.. PH OTO-LIIHO., WASHINGTON. u. (r.

l erally, to improvements in dies for'forming UNITED STATES PATENTOFFICE.

GEORGE A. OHL, :3, OF NEWARK, NEW-JERSEY, ASSIGNOR To GEORGE A... OHL &00.,

. A CORPORATION or NEW JERSEY.

METAL-ENDING DIE.

- To all whom it may concern:, r

fiO

Be it known that I, GEORGE A. OHL, Jr., a citizen of the United States,residing at Newark, in the county ofEsseX and State of New Jersey, haveinvented certainnew and useful Improvements in Metal-Bending Dies; and Ido hereby declare, the following to be afull, clear,--and exactdescription of the invention, suchas willenable others skilled in theart to whichit appertains to make and use the same, reference being hadto the accompanying drawings, and to characters-of reference markedthereon, which form a part of this specification.

Thepresent invention hasreference, gensheet-metal; and,'-xthis inventionrelates,

more particularly, to a novel arrangement and construction of diesadapted to be used in'that class ofpower presses which are employed forbending and forming sheet-metal into desired conformations, suchforexample, as bending and forming the sheet metal into various forms ofcorner-pieces,

angle plates and the like.

The invention has for its princlpal ob ect to provide a novelarrangement and construction of dies by means'of'which may be formed orshaped small nose or bull nose corner-pieces, such as are connected withthe angles of plasteredwa'lls'to reinforce the wall plaster at suchpoints, and thereby prevent chipping and breaking of the wall plaster atsuch corners or angles.

Other objects of the present invention not at this, time moreparticularly enumerated will be clearly understood from thefollowingdetailed description ofthe present 1nvention. l

WVith the objects of the present'invention 'in view, the said inventionconsists, primarily, in the novel construction of dies hereinafter 'setforth; and, theinvention consists, furthermore, in the novelarrangements and combinations of'the various parts of" the dies, as wellas in'the details of the construction thereof, all of which w1ll behereinafter more fully described, and then finally embodied in theclaims which are appended to and which form an essential part "of thisspecification.

' The invention is clearly illustrated 1n the accompanying drawings, inwhich Figure 1 is a transverse vertlcal section of Specification ofLetters Patent.

and embodying theprinciples of the-present invention, the same beingshown in their normal 1n1t 1al posltions; Fig.2 is a similar vlewshowing the novel bending dies in their operated positions upon thecompletion of their bending operations; and Figs. 3, 4: and 5 arerespectively cross-sections of small noseand Fig. 6 of bull nose corner-Patented Sept. 22, 11914.. Application filedApril 8, 1914. Serial No.830,411. v

pieces of the character possible to be formed 7 by the ope-ration ofsaid novelbending dies.

1 Similar characters of reference are employed in all of the abovedescribed views, to

indicate corresponding parts.

Referring now to said Figs. 1 and 2 of the drawings, the referencecharacter 1 indicates theI-bolster or main-body of the upper die-memberfrom the upper surface of which pro ect the pairs oflugs or ears 2adapted to embrace the hammer of a power press for operating said dies,and which are detachably secured to saidhammer by means of thetransverse dowel-pins 3. Said bolster or main-body 1 of the upper diemember corresponds inlength to the length of cornerpieces desired to beformed, such length being usuallyin sizes from eight to twelve feet,although of coursethe invention is not to be limited in this respect.Formed in the under side of said bolster or main-body 1 are a pair oflongitudinally extending channels or grooves 4, in which are receivedthe longitudinally extending stocks or tailpieces 5 of cam-members6which are secured to the under side of said'bolster or main-body 1 bymeans of bolts or screws 7 The said. cam-members 6 parallel each other,

and are maintained by, the engagement of their stocks or tail-pieces '5with said channels or grooves4 from any lateral movement of displacementwith relation to said bolster or main-body 1. Each cam-member 6 isprovided with a properly inclined cam-surface 8, and adjacent to theinner marginal edge portion of each cam-member 6 is a flattenedhammer+portion 9. Connected with said bolster or main-body 1 so astoextend longitudinally between said pair of cammembers 6 is a plungerdie-member 10, the lower or free end of which is wedge-shaped to providea male die-portion, 11, having upwardly diverging side. surfaces 12which may be curved to any desired degree, or which maybe flat surfaces,or which may be a combination of curved and flat surface 55 the novelbending dies madeaccording to according to the desired form to be givento the flaring walls of the corner-piece to be bent or shaped. -Saiolplunger-die member 10 is so associated with said bolsteror main body 1as to be capable of a yieldable vertical movement with relation thereto,and to accomplish this end there are provided openings or sockets 13extending vertically through said bolster or main-body 1,:-andk formedwithin said openings or sockets 13 is an annular shoulder 14L whichprovides a restricted opening 15 of reduced diameten.

die-member is yieldablycmaintained in its projected position byspringsl8r surround: ing saidbolts 16 between the upper, surface i ;ofsaid plunger die-member 10 and. said shoulders 14, so thatthe same arearranged within the lower. ends of said openingsor sockets, 13.. on

The reference character 19 indicates the bed plate of thelowerdie-member, the same benig'provide'duupon its, under side with alongitudinally extendingcrib 20. adapted to be received in acorresponding groove in-the anvil of a POWGI'rPI'QSS to thus aflix saidlower 1 :die-member to the'latter, and in proper registration with, theupper die-member as carried, by the hammer of said power-press. Theuppersurface of said bed-plate 19 is provided with a longitudinallyextending TBchannelQ-l corresponding in width to the 40 Width ofsaidcam-members 6 as attached to the bolster or main-body l of saidupperdiemember, and which are adapted to enter said channel '21whenysa'id upper die-member is carried into cooperative relation withsaid.

lower die-member. Formed at each side of said channel 21, and preferablyin the plane of the bottom 'of said channel,. arejlongitndinallyextending grooves forming fulcrum.

bearings 22. Privot'all'y supported in the said fulcrunrbearings 22, bymeans oftheir fulcrum-ribs 23'formed at theirlower ends, are

a pair" of oscillatable die-members 24, the same being provided withdie-surfaces 25 fCOIlGSPOIldlIlg to the side surfaces 12 of-the maledie-portion 11 formed upon said -plunger die-member 10. Saidoscillatable diemembers 24 are each provided upon their up per surfaceswith projections or ribs 26.

adapted tocreceive the'operat'ive engagement of the cam-surfacesS ofsaid, cam-members 6 of the upper die-member. The said, upper surfaces ofsaid oscillatabledie-members 24 are also provided with longitudinallyex-v tending receiving-surfaces 27 adapted to receive the contact andpressure of said hammer-portion 9 of said die-members 6 connected. withsaid. upper die-members Ins serted in the oppositely facing inner edgesof said oscillatable die-members 24 are longitudinally' extendingpinching dies 28, the 7 -same having downwardly projected die-portions29, the' rear or under sides ofwhich are (undercut. as at.30. Saidpinching-dies 28 are made, preferably, vof hardened tool steel.Extending centrally, and longitudinally through said channel 21', thesame being seatedz in a groove 31 whereby it is retained against--lateral displacement, is a female-die 32,havin g,a;conc aYe:die;por-- otion 33in :its upper, surface. Said female; 30 die 32 is alsofpreferably madeof hardened; tool-steel In order to returnandmaintainsaid oscillatable die-members 24: in their.no ry mal initial or raisedpositions there are .pro-

vided; compression springs 34: which are seated in receiving recessesorj sockets, 35 7 formed in the bed-platelt), the uppenends of saidspringsfil beingseated in depressions. cr -sockets 86 formed ontheunderside of said oscillatable die-members. 2t. In order 6' to,retain said fulcrum-ribs 23 ;of-s a idv;oscillatable die rnembers 24:sea ed- 'in-their respectivefulcrurn bearings 22, said oscillate" abledie-members 24 are provided at their a respective outerv ends withoutwardly pro jectedstuds 37 which are Jjournaled in re-I taining vlinks38 which ,are secured by belts 39 to the respective ends of said' bedlplate 19. v i The operationof the ,abpye described construction offormingor bending dies isfas follows The sheet-metal strip which is to Ibe bent into a small-nosed or bull nosed-cor her-piece is first bentlongitudinally inane gularform having ,a rounded. apex (as illus 5trated in dotted representation in Fig, 1 by,v means of preliminaryor'first operation dies, and when so bentithe sameis laid between saidoscillatable die-members. 24s with the jrounded ,apex registered above"said female 0 'die32; The upper die member is now allowed to descend,and the male ,die-portionill of the plunger die-member 10 centersth'emetal strip and tends to carry the same downward to seat its roundedapex inthe female-die 32-, As the upper die-memberdescends thecamsurfaces 8 ofthe cam-members 6 there of engage the projections.oriribs 26 of the, oscillatable die-members 9A,: thereby causing thesameto swing downwardly on their 6 fulcrum, simultaneously, causing thedie- J surfaces 25t to engage the metal strip. and force the same incontact witlrthe die-sure faces 12-jof the plunger die-member 10, and,causing the die-portions 29 ofthe pinching dies, 28 to move, intocontact. w ithfthe apex of the metalstrip. j 1' As thedownward movementof theupper die continues the .hammereportions 9. of the i cam-rnembers6 engage the re ceiving sur facesi 2 7 of the oscillatable die-members24, 1 and thereby a downward pressure is exerted 1 upon the die-members24 which causes the "pinching-dies 28 1 to pinchfthe metal striptogether just above the apexof thesame as 1 1 seated in'the female-die32, and during this 25'of thegdie members iwithout preventcure theoperation ofithe jpinching dies 28 i i as just described. Itwillbeapparent that j variousi degreesof -the -pinching operation "may besecuredlby regulating the degree of,

' 1 the downwardstrokeqormovement of the a stroke of the upper upperdie-member 15 B shortening the ie-mernber, various sizes ofsmall-nosed?corner-pieces 40 may be formed, such as are illustrated moreparticularly inFigs'Sandiand 5 of the'drawings,

and by completing the-full stroke of, the

upper die-member bullrnosed" corner-pieces 41, may be formed, such asillustrated in Fig, 6 Of the drawings) I e I I am aware thatsome changesma z made in the arrangements-and combinations of the various devicesand parts,- as well, as in the details of the, construction 'of thesame, without departing from the scope of the present invention asdescribed inthe foregoing specification, and as defined in 1 -the claimswhich are appended hereto.

Hence, I do not limit my invention to the exact arrangements andcombinations of the devices and parts asset forth in the saidspecification, nor do I limit myself'to the eXact details oftheconstruction of the said parts, as illustrated in the accompanyingdrawings. 1 a I claim 1 a v 1. In metal bending vdies, .a pair of oppo-I sitely facing oscillatable dieportions, sup

porting means upon which said die-portions are fulcrumed, &- femaledie-member centrally disposed on said supporting means between said dieportions and toward which the latter swing, pinchingdies fixed in thefree ends of said'die-portions and alinedbelow the die-surfaces thereof,said pinch} ing-dies coiiperatingwith said female die- .V f"mcmberduring the bendingoperations, 2a ,vertically movable upper die-memberprovided with means for operating said oscil-; latable die-portionswhencontacting there-,

with, and amale-die connected with said upper, die-member with which thedie-surfaces of said 1 oscillatabledie-portions 00- operate during thebending operations.-

cally yieldable plunger-die mounted on said member consisting of abedrpla'te, oppositely j facing oscillatable die-portions; fulcrumed2.'In metal bending dies, at lower die- 1 member consisting of abed-plate, op ositely facing oscillatable die-portions lcrumed on saidbed-plate, each oscillatable dieeportion having a projection on itsupper side, each oscillatable die-portion having die-surfaces at itsouter end, pinching-dies secured in the lower marginal edges of theouter end of said oscillatable die-portions, spring-means connected withsaid bed-plate and-engaging said oscillatable die-portions, I 1 tomaintain the latter in normal initial position, and a female-die havinga concave -d1fe depression secured to said bed-plate so as to extendlongitudinally between said 'oscillatable die-portions; 'a verticallymovable upper die-member consisting of a bolster,

cam-members connected with said bolster having cam-surfaces. adapted toengage said 1 projections of said oscillatabledie-portions to operatethe latter, a hammer-portion connected with eachoam-member adapted toengage said hammer-receivingsurfaces of 1 said oscillatabledie-portions, and a vert1- e bolster, said lunger-die-havin a male-dieportion provlded with die-sur, aces adapted to co'ciperate with thedie-surfaces of said oscillatable die-portions.

3. In metal-bending dies, 1 1 lower dieon said bed-plate havingdie-surfaces at their outer ends, pinching-dies secured to the lowermarginalfedges of the outer ends of said oscillatable die-portions,spring-v means mounted in said bed-plate and engaging said oscillatabledie-portions to I maintain the latter in normal mitialQpositions, astationary female-die secured to saidbed-plate and extendinglongitudinally between said oscillatable die-portions; a 1 a fvertically movable upper die-member con- 1 ""sisting 0f a bolster, cammeans connected;

with said bolster for engaging and 0perat ing said oscillatabledue-portions of said lower die-member, and a vertically yieldableplunger die mounted on said bolster, said plunger-die having a maledie-portion provided with die-surfaces adapted to 00 In testimony, thatI claim the invention set forth above I have hereunto set my hand this30 day of March, 1914.

GEORGE A. oini, JR.

Witnesses:

AUGUST A. BERGHOF, f.FREDK. C. FRAENTZEL.

.1 Copies of this patent may v be' obtained are cents each, byaddressing the Commissioner 01 Patents,

' 1 a 1 1 Washington, I). G. 1

.operatewith the die-surfaces of said oscilla'table die-portions.

